Accumulated Other Comprehensive Income by Component (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
12 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
| AOCI Attributable to Parent, Net of Tax [Roll Forward] |
|
|
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss), beginning balance |
|
|
|
$ (13,914)
|
|
|
|
| Accumulated Other Comprehensive Income (Loss), ending balance |
|
$ (12,337)
|
|
(12,337)
|
|
$ (12,337)
|
|
| Accumulated Defined Benefit Plans Adjustment |
|
|
|
|
|
|
|
| AOCI Attributable to Parent, Net of Tax [Roll Forward] |
|
|
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss), beginning balance |
|
(30,532)
|
$ (34,331)
|
(29,869)
|
$ (34,884)
|
(34,105)
|
$ (9,818)
|
| Other Comprehensive Income (Loss) before Reclassifications |
|
0
|
0
|
0
|
0
|
3,777
|
(24,775)
|
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |
[1] |
(804)
|
226
|
(1,467)
|
779
|
(1,008)
|
488
|
| Accumulated Other Comprehensive Income (Loss), ending balance |
|
(31,336)
|
(34,105)
|
(31,336)
|
(34,105)
|
(31,336)
|
(34,105)
|
| Accumulated Net Unrealized Investment Gain (Loss) |
|
|
|
|
|
|
|
| AOCI Attributable to Parent, Net of Tax [Roll Forward] |
|
|
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss), beginning balance |
|
28,925
|
35,726
|
27,765
|
38,957
|
25,769
|
39,525
|
| Other Comprehensive Income (Loss) before Reclassifications |
|
3,493
|
(6,485)
|
7,459
|
(6,854)
|
12,058
|
(4,537)
|
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |
|
(1,687)
|
(3,472)
|
(4,493)
|
(6,334)
|
(7,096)
|
(9,219)
|
| Accumulated Other Comprehensive Income (Loss), ending balance |
|
30,731
|
25,769
|
30,731
|
25,769
|
30,731
|
25,769
|
| Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges |
|
|
|
|
|
|
|
| AOCI Attributable to Parent, Net of Tax [Roll Forward] |
|
|
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss), beginning balance |
|
(11,693)
|
(11,959)
|
(11,810)
|
(12,074)
|
(11,887)
|
(12,146)
|
| Other Comprehensive Income (Loss) before Reclassifications |
|
0
|
0
|
0
|
0
|
0
|
0
|
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |
|
(39)
|
72
|
78
|
187
|
155
|
259
|
| Accumulated Other Comprehensive Income (Loss), ending balance |
|
(11,732)
|
(11,887)
|
(11,732)
|
(11,887)
|
(11,732)
|
(11,887)
|
| Accumulated Other Comprehensive Income (Loss), Net of Tax |
|
|
|
|
|
|
|
| AOCI Attributable to Parent, Net of Tax [Roll Forward] |
|
|
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss), beginning balance |
|
(13,300)
|
(10,564)
|
(13,914)
|
(8,001)
|
(20,223)
|
17,561
|
| Other Comprehensive Income (Loss) before Reclassifications |
|
3,493
|
(6,485)
|
7,459
|
(6,854)
|
15,835
|
(29,312)
|
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |
|
(2,530)
|
(3,174)
|
(5,882)
|
(5,368)
|
(7,949)
|
(8,472)
|
| Accumulated Other Comprehensive Income (Loss), ending balance |
|
$ (12,337)
|
$ (20,223)
|
$ (12,337)
|
$ (20,223)
|
$ (12,337)
|
$ (20,223)
|
|
|